at a discount　

at a discount　按赔价计算，按贴水价格计算，打折扣　

1.to deduct a certain amount from（a bill，charge，etc.）2.to offer for sale or sell at a reduced price.3.to advance or lend money with deduction of interest on（commercial paper not immediately payable）.4.to purchase or sell（a bill or note）before maturity at a reduction based on the interest for the time it still has to run.5.to leave out of account；disregard：even if we discount the irrelevant material，the thesis remains mediocre.